Endosymbiotic Theory Natural Selection

"Endosymbiosis" means

• Living together
• Living inside
• Entering together
• Joining together

The theory of Endosymbiosis explains

• The origin of eukaryotes
• How species develop
• How bacteria live
• Why cells rely on one another

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____________ & _________________ are organelles that definitely arose from endosymbiosis.

• Rough ER & Smooth ER
• Mitochondria & Flagellum
• Chloroplast & Mitochondria
• Chloroplast and Golgi apparatus

All of the following are evidence of endosymbiosis EXCEPT

• mitochondria and chloroplast ribosomes are similar to bacterial ribosomes
• mitochondria and chloroplast are similar in size to bacteria
• mitochondria and chloroplast have double membranes
• mitochondria and chloroplast have a nucleus

Theory that says eukaryotic cells formed from symbiosis among several different prokaryotes.

• Natural Selection
• Biogenesis Theory
• Evolutionary Theory
• Endosymbiotic Theory

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In this diagram, the endosymbiont is

• blue
• green
• purple

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The theory that mitochondria and chloroplasts were once ancient prokaryotic is called

• endosymbiotic theory
• seed theory
• primordial soup
• origin of life

We know that endosymbiosis happened first with mitochondria and later with chloroplast. Why?

• Mitochondria make energy and cells need energy more than the sugars produced by chloroplasts.

• All eukaryotes have mitochondria including plants and algae, but only plants and algae have chloroplasts as well as mitochondria. This suggests, that the first eukaryotic cells first accquirred mitochondria and chloroplasts came later.

• We actually do not know which one came first - this happened too long ago for us to know about.

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Which type of cell came first?

• Eukaryotic
• Prokaryotic
• Plant
• Both Eukaryotic and Prokaryotic cells evolved around the same time

Which of the following is NOT evidence for endosymbiosis?

• Chloroplasts & mitochondria have DNA similar to prokaryotes

• Chloroplasts & mitochondria reproduce by binary fission similar to prokaryotes

• Chloroplasts & mitochondria contain 70s ribosomes similar to prokaryotes

• Chloroplasts & mitochondria move around the cell freely

• Chloroplasts & mitochondria can survive independently outside of the eukaryotic cell